please help me with questions 8 and 9. I also need help with number 5 from c-f.

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4 of 4 ZOOM + 8. 9. 10(points) Let X 1, X2, X3, ...,Xn be a random sample that have exponential distribution with parameter A. a) Find the method of moments estimate b) Find maximum likelihood estimation 10(points) Let Xl, X2, X3...Xn, Let X 1, X2, X3, Xn be a random sample that have mean and variance o. 2 a) Find the method of moments estimatesp, 6 2 b) Find maximum likelihood estimation g, 6